Acta Neuropharmacologica››2011,Vol. 1››Issue (4): 6-11.

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The Antidepressant Effect of the Total Flavonoids Extracted fromCottonseed and its Regulation on Hippocampal Monoamines

ZHAO Nan1,ZHANG You-zhi1,YANG Ming1,WANG Yi-wen2,ZHAO Yi-min1,GONG Ze-hui1,LI Yun-feng1

  1. 1. Institute of Pharmacology and Toxicology,Academy of Military Medical Sciences,Beijing,100850,China2. Department of Pharmacy,302 Hospital of PLA,Beijing,100039,China
  • Online:2011-08-26Published:2012-11-24

Abstract:Objective:To explore the antidepressant effect of the total flavonoids extracted from cottonseed (CTN-T) and its possible mechanism.Methods:The learned helplessness model in rats was used to evaluate the antidepressant effect of CTN-T. Using the 5-hydroxytryptophan(5-HTP)induced head twitch response test and yohimbine toxicity potentiation test in mice,the possible monoamine targets of the antidepressant action of CTN-T were detected. Moreover, high performance liquid chromatography and electrochemical detection (HPLC-ECD) was used to determine the content of monoamine and metabolites in the hippocampus of rats following CTN-T administration.Results:Repeated administration of CTN-T (50,100 mg·kg-1,ig,twiceper day for 4 d) significantly decreased the helplessness behavior induced by inescapable foot- shock in learned helplessness test in rats. Repeated administration of CTN-T (50,75 mg·kg-1, ig,twice per day for 4 d) significantly increased the 5-HTP induced head twitch response in mice,while CTN-T (60 mg·kg-1,ig,twice per day for 4 d) had a tendency to potentiate yohimbine toxicity in mice. Repeated administration of CTN-T (25~75 mg·kg-1,ig,twice per day for 4 d),the neurochemical assays showed that the content of 5-hydroxytryptamine (5-HT) was increased in rat hippocampus at 25 and 100 mg·kg-1dose of CTN-T,and that the content of norepinephrine (NE) was increased at 50 and 100 mg·kg-1dose of CTN-T. By contrast,CTN-T had no effects on the content of dopamine (DA),epinephrine (E),5-hydroxyindolacetic acid (5-HIAA) and the rate of 5-HT/5-HIAA.Conclusion:CTN-T exerts antidepressant effects which may be closely related to the strengthening of the hippocampal serotonergic and noradrenergic function.

Key words:depression,totalflavonoids extracted from cottonseed(CTN-T),learnedhelplessness model,5-hydroxytryptamine(5-HT),norepinephrine(NE)

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